Communion in most Christian churches is a sacred ceremony of eating bread and drinking wine in loving commemoration of Christ Jesus' last supper before the crucifixion.
Communion in the Christian Science Church is sacred, silent prayer commemorating the morning breakfast of Jesus and a few of his disciples after the resurrection. This is a communion of "remembrance and love," Miscellaneous Writings, p. 91. to use a phrase of Mary Baker Eddy's. She says in Science and Health: "This spiritual meeting with our Lord in the dawn of a new light is the morning meal which Christian Scientists commemorate. They bow before Christ, Truth, to receive more of his reappearing and silently to commune with the divine Principle, Love." Science and Health, p. 35.
Such communion is not reserved for church services alone. It is also a sacred experience in the daily lives of individuals.